The length of each side is increased by 2 units. Calvin says that would double the perimeter of the rectangle.
Is he correct? If not, state his error.
A.
Calvin is correct.
B. Calvin is incorrect. He should have squared the 2, so the perimeter would be quadrupled (multiplied
by a factor of 4).
C. Calvin is incorrect. He should add 2 to each side not multiply each side by 2.
D. Calvin is incorrect. He should have cubed the 2, so the perimeter would be multiplied by a factor of 8.
First step: Find the old area. What is the formula for area of a rectangle?
Next step: Find the new area by increasing the measurements 2.
Last: Find new area.